I'm stumped. I have exploring the use of Aspose Cells for a client. I installed the current version of Aspose.Cells.dll from your site and when I run the a simple test (see below), I receive "Object reference not set to an instance of the object". I have enclosed the workbook in question.
After testing , we find some featuers are not supported in the this file when opening Excel 2007 xlsx file. We are doing with them. Thanks for your patience.
StackTrace " at Aspose.Cells.OpenXML.᭬.ᮄ(XmlTextWriter ቄ)\r\n at Aspose.Cells.OpenXML.᭬.ቃ(XmlTextWriter ቄ)\r\n at Aspose.Cells.OpenXML..(Workbook ᚠ, Stream )\r\n at Aspose.Cells.Workbook.Save(Stream stream, FileFormatType fileFormatType)\r\n at Aspose.Cells.Workbook.Save(String fileName, FileFormatType fileFormatType)\r\n at Test_xlsx.Form1.buttonTest_Click(Object sender, EventArgs e)" string
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